You can link TypePad blog entries with Wikispaces pages and import those blog entries into Wikispaces pages. The imported text can then be edited just like regular Wikispaces content. Linking with Blogger is not currently an option.

Conceptually, you might want to use the content of some of your blog entries to build long-lived material on your wiki.

For example, you might be a mathematics class in which each student has a blog where they post math problems they are having trouble with. Each student could link their math problem blog entries to a page on the class wiki where the class catalogues these problems for later review.

Or you could be a group of political bloggers. You might set up a wiki with topic related pages so that all your rants about the supreme court, free markets, and taxation, could be collated and turned into a set of coherent diatribes.